I don’t anything about getting exceptions to the time-away rules in reality (which in Portugal can be very different from what their laws and regs suggest). Maybe others can advise?
But on the PR front, it would seem:
Think the only successful grant of PR I’ve seen on this forum the past 4 years is someone who went in for a regular Temp ARI renewal appointment and got that changed to a PR request on the day (see here and here).